Three useful first steps
- Gather records. Look for the yellow card, clinic printouts and records from other provinces or countries.
- Check with public health. Ask what is on file and how to submit missing information.
- Book a review. A provider checks vaccine types, dates, age and health history before planning further doses.
Does a late series need restarting?
Usually, valid earlier doses still count. Catch-up generally continues a series rather than restarting it. A dose given too early or too close to another dose may not count. A provider needs to review the record. Guidance on delayed vaccine schedules
Rotavirus has strict age limits. The first dose should start before 15 weeks, and all doses should be completed before 8 months. If a baby has missed a dose, contact the clinic promptly.
When records cannot be found
Ask previous clinics and public health units. If records cannot be recovered, a provider can advise which vaccines to offer; blood tests are useful only in selected situations. Do not rely on memory alone to confirm protection.
New to Ontario
Bring original records and a translation if available. Doses from another country may count if the product and timing are valid. Ask about language support, local clinics and publicly funded options, including if you do not have an Ontario health card. Requirements vary by program.
Travel, exposure or medical conditions
Contact a provider or public health promptly after a possible exposure or before travel. Earlier doses, additional vaccines or other protection may be needed. If measles is suspected, call ahead before attending a clinic. Pregnancy, immune conditions, major allergies and recent blood products can also change the plan.
Sources and references (5)
Program details can change. How this guide is reviewed